Shower Venting Help

Old 08-27-08, 11:28 PM
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Shower Venting Help

Hello all we are installing a new shower and all plumbing and i want to know how to vent this thing the 2" trap is only 14" away from the 3" main run witch runs to a WC and tees off to a 2" lav the Lav is vented with a 11/2" tieing in to the exesiting house vent the run on the 3" main to the lav vent is around 7' is a sepret vent even needed for the shower with such a short run?
thanks in advance for the help
Old 08-28-08, 04:50 PM
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Codes may be different in different locales, but around here we can wet-vent for I think about 6 feet. You should be fine. Wet venting is when the drain and vent are one in the same for a given distance. Your lav vent sounds dry-vented, where it vents upward and then horizontally ties into the main stack.
Old 08-28-08, 05:28 PM
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It sounds like you may be ok. but if you could take some pictures and upload them to a site like and the post the link here, we can be more accurate with our answer.

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